Method of renewing carbon and similar papers



APPLICATION FILED SEPT. 15, I919.

Patented Nov. 8, 1921.

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straight line across the sheet.

nanny n. BUGKLEY, or balance, rumors,

comrm, or cnxcaeo, rumors;

ASSIGNOR 'IO ASSOCIATED ENGINEERS A CORPORATION 01' ILLINOIS.

.METHOI) OI CARBON AND SIMILAR PAPERS.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application and September [1919. Serial No. mp1s.

To all whom it may concern: I

Be it known that I, HARRY H. BUoKLEY, a citizen of the United States, residing at Chicago, in-the county ofCook and State of Illino1s, have invented a certain new and useful Improvement in Methods of Renewing Carbon and Similar Papers, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. Y

My invention relates to a method for renewing carbon paper and other similar paper. It is well known that after a sheet of carbon paper has been used a few times on a typewritin or other impression machine portions 0 the sheet have the carbon removed therefrom so that the sheet will not thereafter give a smooth and even impression. I

When a sheet of carbon paper is placed between two sheets of typewriting paper and inserted into a typewrltin machlne it is subjected to impression" o t pe in a hen the carbon paper is inserted into the machine a second time it assumes nearly the same position that it assumed in the firstoperation, the second impression of the type is made on practically the same line as the'first impression. Those portions of the carbon paper between the several lines of impres- SlOl'lS remain practically intact and it is the v purpose and object of this invention to devise a method by which the carbon remaining on the aper maybe spread evenly over the entire siieet so that-the carbon sheet may be used over and over again, and will perform the functions of a new sheet ofcarbon paper.

his well known that a sheet ofcarbon paper is formed from a sheet of tissue paper covered over with a paste or coating made of lard and lamp black. It is to be understood, however, that these are not the only substances that may be employed because paraffin or any substance having properties the same as lard may be used in place of it. Likewise, other forms of carbon may be used in place of the lamp black. Instead of carbon, coloring matter of any kind which can be manufactured inpowder form may be used to make the impression paper.

Another object of the invention is to prodisclosed in the drawings accompanying this specification. In this specification and in the drawings I have disclosed one form which my invention may take which form is best known to me at the present time. However, it is to be understood that by this specification and the accompanying drawings I do not intend to limit myself .to the spe-' cific method or construction disclosed as modifications of the specific method or construction may be required in the practice and manufacture thereof or may occur to those skilled in this art. The real scope and nature of the invention disclosed is to be determined from claims appended to this specification. 1

The same reference-characters have been used to designate the same out the several views of the drawings in which, Figure 1 is a side view of my device attached to a suitable support. Fig. 2

.is a longitudinal vertical section thereof.

Fig. 3 is a section on line 33 of Fig. 2.

Referring now to the drawings, I show a bracket member 10 which is adapted to be detachably secured to a supporting member 11 such as the edge of a table, a shelf or a window-sill. The bracket member 10 is provided with a suitable strengthening rib 12, an upper horizontal arm 13 which is adapted to enga e the top surface ofcthe support 11 an which is adapted to extend beneath the support as shown in the drawings. The arm 14 is provided with a threaded opening 15 which is adapted to receive a thumb screw 16 which screw may be turned up to engage. the lower surface of the support as shown in the drawings in order. to rigidly secure the bracket to the support.

The bracket member 10 is provided with an upwardly extendin ortion 17 which is provided with a suite. e o ening' adapted to receive one end of a tubeike member 18. This member is shown round in the drawthe lower horizontal arm 14:.

parts throughings but it will be apparent that same may be made oval or elliptical in cross section if so desired. The principal requirement is that the tube shall not have sharp or square corners. The outer end of the tube is closed by a suitable stopper 19 which may be an ordinary cork. The tube is maintained rigidly' through the extending-portion 17 by means of a screw 20 which screw passes through an opening in the tube and engages a suitable insulating member 21 which closes the other end of the tube.

A suitable conducting wire 22 passes through an opening in the member-21 as shown in Fig. 2 -of the drawings. The wire contains two conductors 23 and 24. The

free end of the wire 22 (which is not shown) may be provided with any suitable plug or like socket. Locatedwithin the tube 18 is a hollow glass tube 25 and located within the tube 25 is a second hollow glass tube 26. The outside diameter of the tube 26 is less than the inside diameter of the tube 25 so that aspace is provided between the adjacent walls of the tubes.

Wound around the inner tube 26 is a resistance coil 27 which is wound spirally around the tube 26 and occupies the space between the tubes. The conductor 23 passes through the inner tube and its free end is formed into a hook portion 28 which engages a number of turns at the. outer end of the resistance coil. The conductor 24 has its free end formed into a hook 29 which engages a number of turns at the inner end of the resistance coil. Withztllis construction it will be apparent that when electrical same portions of the paper, the operator will lay the paper across the heated tube 18 preferably with the carbon surface upward. Theends of the sheet of paper will extend downwardly at the sides of the tube 18. The sheet of carbon paper is then drawn across the tube from one end of the sheet to the other. When the paper is thus drawn across the heat will cause lard or paraflin contained in the paper to melt and the carbon remaining on the pa er will flow with the melted lard or para 11 to those portions of the paper where carbon has been removed in use. Thus by simply drawing the sheet of worn carbon across the heated tube the remaining carbon is formed into a smooth, even layer onthe sheet of paper would otherwise have to be discarded, as

useless.

From theabove description the nature'and construction of my invention will be apparent. 'What I claim as new anddesire to secure United State Letters Patent is:

1. The method of renewing carbonand other similar paper which consists of applying heat progressively to the under sur face of the used paper and thereb causing the carbon thereon to be redlstributed evenly over the paper. e

2. The method for renewing carbon and other similar paper which consists of drawing a used sheet of paper across a heated surface in order to cause the carbon to be ing a used sheet of the paper from end to other similar paperv which consists in drawend over a rounded heated surface in order to cause melting of the binding material and redistribution of the carbon carried thereby.

4:. The method for renewing carbon and other similar aper which consists in progressively sub ecting a usedsheet of paper to a heat so as to cause melting and flowing of the impression material carried thereby. 5. A method for renewing carbon and similar paper which consists in progressively applying to an inclined surface of a used sheet of the paper sufficient heat to cause the impression material carried by said paper to fiow on said paper to form a smooth even surface.

6. The method of renewing carbon and other similar paper which consists in drawing a usedsheet of the paper over a heated inclined surface in order to cause-melting of the binding material whereby the same is caused to flow down said inclined surface and thereby redistribute the carbon carried thereb over said paper.

7. he method of renewing impression paper which consists in progressivelyapplyingheat to the surface of used sheets of said paper.

8. The herein-described process of renewing used sheets of carbon paper, which consists in drawing the same over a straight narrow heated surface. 9. The herein described process of renewing used sheets of carbon paper, which consists in drawingthe same over a hot rectilinear curved surface. 10. The method of renewing impression p p r which c nsists n dmwmg a used sheet of said paper over a surface heated to melt the binding material of said paper and cause the unused pigment to flow over the used portion of said paper, thereby to redistribute the coating carried by said paper over the same.

11. The method for renewing carbon and other similar paper which consists of drawing a used sheet of paper across a heated 10 surface in order to cause the carbon to be redistributed evenly over the paper, said surface bein heated to a uniform temperature that wil not affect the chemical composition of the pigment or of the vehicle of said carbon paper.

In witness whereof, I hereunto subscribe my name this 5th day of September, A. D., 1919.

HARRY H. BUCKLEY. 

